Combined steam-shovel dipper



May 13 1924.

S. PEARSON COMBINED STEAM SHOVEL DIPPER Filed Sept. 20. 1923 26 fran /ZZZ? 15: 5 rdfl r60 IC/ :W

Zficeas:

Patented May. 13, 1924. i

PATENT OFFICE.

UNITED STATES SIG-U'Iil) PEARSON, OF HIBBING, MINNESOTA.

ooma mnn STEAJiflZ-SHOV'EL DIPPER.

To all whom it may concern.

Be it known the t I, SIGURD PEARSON, a citizen of the United States, residing at Hibbin in the county of St. Louis and State cifically to a dipper adapted to cleanly dump its contents when the dipper itself is located a at widely varying angles.

upon tracks at charge.

In strip mining operations and other similar types of excavating work, very large steam shovels have been evolved using di pers having a capacity of as high as eig t cubic yards. Theyare handled upon long booms or dipper sticks and are capable of discharging their contents upon the bank of the cut or excavation at a point as high as forty feet above the level n on which the shovel car is located... In suc operations it is sometimes desiraltage to dischar e the ma-' terial into cars loca d upon the oor'of the out. There is thus a very wide difference in the angle at which the dipper is held when dischargin into cars on t cut from t an .when discharging into cars the t? of a' forty-foot bank. Due to the weight the material, it is impractical to dump the load into cars in the cut by raising the shovel at any very great distance above the cars.

Shovels .of usual type are approximately cubical in form with a door upon the bottom, this door usually being in a plane approximately parallel to that of the dipper stick. Such dippers discharge properly in cars upon the bank where'the dipper stick is horizontal or not -materially above or below this position. However, when dischargin into cars upon the pit bottom, the front 0 the dipper and the bottom are both at applroximately degrees to the horizontal.

nder these circumstances, there is a tend ency for a large ortion of the load to re main upon the Certain types of di pers have been evolved in the endeavor to so ve this problem as, for example, by hinging the front to, serve as a dumping opening and also by making the bottom at an an le to the dipper stick and to the dipper si es. While such constructions may add to the dumping ability in e tracks in the ipper front and not dis- Application filed September 20, 1923. Serial No. 663,809.

some positions, they are not as eflicient as the usual type of dipper when the latter is" dumped in its proper position.

It is an object of the present invention to rovide a dipper adapted for dumping upon he pit floor or upon the pit bank.

It is a further object to provide a dippof this character in which a plurality of ill: dipper walls are hinged for discharge p poses.

It isalso an object to provide adipper in which the plurality of moving walls are so interconnected that'thev move in unison.-

It is an additional obiect to provide a dipper which may be adjusted so that but a sin le side is open for dumping purposes.

' ther and further objects will appear as the description proceeds.

I have illustrated a preferred embodiment of my invention in the accompanying drawings, in which Figure 1 is a side elevation of the dipper in closed position, a portion being broken awa to show the latch construction;

F1gure2' is a front view of the dipper,

-a portion being a section upon line 2-2 of Figure 1; and r Figure 3 is a side elevation of the dipper inopen position.

i The dipper as shown comprises the dipper body having the sides 11 and back 12, the back or rear being secured to the dipper stick 13. The bottom 14 is carried by hinges 15 which are pivoted at 16 to the rear of the dipper. The dipper front 17 is pivoted to the sides 11 at 18. The front may be provided with any usual type of teeth 19.

The dipper front 17 is provided with the rearwardly extending portions 20 which are connected bv links 21' to the upwardly ex tending ears 22 of the dipper bottom 14. The sides 11 are provided with the guide plates 23 which co-operate with guide plates 2i on the dipper front to form a rigid guid-. ing and thrust receiving connection.

The dipper front is provided: with the change.

particularly adapted for discharging its contents upon the pit floor. When so discharging, the dipper stick 13 is inclined downwardly approximately at an angle of degrees. In this position, if the front were rigid, much of, the. material would remain upon the front and not be discharged. However, withthe pivoted front connected to the ivoted bottom, as shown in Figure 3, when t e latch 26 is withdrawn, the weight of the material swings open both front and bottom and there is aclean dump.

Both the front and bottom portions would open without the use of the link 21. It is essential, however, for a proper closing of the dipper that both bottom and front swing to the closed position at the same instant so that the latch will'catch. This simultaneous closing is assured by the links 21.

When it is desired to use a dipper for' loading ontop of the'banks it is unnecessary to have the front open as the bottom will be approximately horizontal. Therefore, when preparing the dipper for this use, the links 1 will be removed and the dipper front s ecured to theguide plates23 by passing bolts through the co-operatin holes 28. In this condition, the dipper umps as a cubical di per of ordinary construction.

t will be understood that there is seldom need for rapid change from it loading to bank loadin each type of oading being carried on or a'considerable period until the nature of the cut or work requires a Thusthisaddition or removal of the links 21 need only take place at relatively great intervals and thus does not militate against the usefulness of the dip er.

It is to be understood that the speci c embodiment shown is by way of example only and I contemplate such chan es and modifications to meet varying con itions as ma come within the scope of the appende claims. I a

I claim:

1. A steam shovel dipper comprising a fixed portion, a plurality of movable wall portions, and interlockinglatching means carried by said movable portions 2. A steam shovel dipper comprising a fixed portion, a plurality of movable wall portions, interlocking latching means carried by said movable portions, and means connecting said-portions whereby they are constrained to move in unison.

3. A steam shovel dipper comprising a fixed portion, a plurality of movable wall portions, and means whereby one of said portions may be rigidly connected to the fixed portion. I

4. A steam shovel dipper comprising a fixed rear and side wall portion and movable front and bottom portions.

5. A steam shoveldipper comprising a fixed rear and side wall portion and movable front and bottom portions, the front portion being hingedly connected to the sides and the bottom to the rear ortion.

6. 1. steam shovel ipper comprising a fixed rear and side wall portion and movable front .and bottom portions, the adjacent edges of the bottom and front being the free ed es thereof.

A steam shovel dipper comprising a fixed rear and side wall portion, movable front and bottom portions, the adjacent edges of the bottom and front being the free edges thereof, and latch means carried by the front and bottom adapted to maintain them in closed position.

8. A steam shovel dipper comprising a fixed rear and side wall portion, movable front and bottom portions, and links connecting the movable portions whereby they are constrained to move in unison. i

9. A steam shovel'di per comprising a fixed rear and side wal portion, movable front and bottom portions, and means whereby the front ortion may be rigidly connected to the filled portion.

10. A steam shovel di per comprising a fixed rear and side wal portion, ,movable front and bottom portions, removable links connecting the movable portions whereby they are constrained to move in unison, and related bolt holes in the front and fixed portions whereby the front portion may be rigid-l connected to the fixed portion.

igned at Hibbing, Minnesota, this 10th day of September, 1923.

SIGURD i nxnson. 

